Investigation of giant magnetostriction in the low field for DyFe thin films

Abstract The DyFe2 single phase thin films were prepared by the ion beam sputtering method after annealing at 873 K. In order to obtain the large magnetostriction (MS) in the low applied field region, three kinds of samples were prepared, DyFe2 single-layered, Fe/DyFe2/Fe tri-layered and DyFe2 in an alternating line shape grooves made of Fe. The softening of MS was observed for the DyFe2 film and trilayered sample. Moreover, decreasing of the coercivety was observed for DyFe2 in the Fe groove sample in the applied field perpendicular to the groove line.